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Default Arguments Should Not Be Repeatedly Specified in the Function Template Definition

Error Information

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template <typename T = int>
void printSize(void);
template <typename T = int>
void printSize(void) {
  std::cout << sizeof(T) << std::endl;
}

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error: template parameter redefines default argument
    3 | template <typename T = int>
      |                        ^
note: previous default template argument defined here
    1 | template <typename T = int>
      |                        ^

Problem

If default arguments have been specified during the declaration of a template function, they should not be repeatedly specified during the definition of the template function.

Solution

  • Remove redundant argument specifications.
  • Use the clang-tidy tool to identify such issues and provide modification suggestions.